Alfonso VII of León and Castile, born in 1104, was a significant medieval king who ruled from 1126 until his death in 1157. He was the first monarch to use the title "Emperor of All Spain," reflecting his ambition to unite the various Christian kingdoms in the Iberian Peninsula. His reign was marked by military campaigns against the Moors and efforts to consolidate power in Leon and Castile. Alfonso VII was known for his administrative reforms and support of the Church, which helped strengthen his rule. He also promoted the repopulation of conquered territories, encouraging settlers to move into newly acquired lands. His legacy includes the establishment of a more centralized government and the expansion of Christian influence in the region.